Problem with xterm-301-1

Problem with xterm-301-1

[Ola Strömfors]

Hi,

After updating from 291-1 to 301-1 xterm starts /bin/sh instead of
my shell specified in /etc/passwd or in the SHELL environment variable.

The workaround I have found is to create /etc/shells with a list of
permitted shells, e.g.

/bin/ash
/bin/bash
/bin/dash
/bin/sh
/bin/tcsh
/bin/zsh

Regards,
Ola Strömfors

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Re: Problem with xterm-301-1

[Jim Reisert AD1C]

On Thu, Feb 20, 2014 at 10:47 AM, Ola Strömfors wrote:

> After updating from 291-1 to 301-1 xterm starts /bin/sh instead of
> my shell specified in /etc/passwd or in the SHELL environment variable.

I saw the same thing, but only on my home computer running Windows 7
Pro 64-bit, not on my work laptop running Windows 7 Enterprise 64-bit.

I start Xwin this way (i.e. same as Cygwin-X group in Start menu):

    C:\Cygwin\bin\run.exe /usr/bin/bash.exe -l -c /usr/bin/startxwin.exe

I don't know why SHELL defined as /bin/sh by default (my entry in the
/etc/passwd file invokes bash).  I could not find a way to change
SHELL before XWin starts.

One way I fixed it was to launch xterm from .XWinrc like this:

        "xterm"      EXEC  "xterm -e /bin/bash"

instead of this:

        "xterm"      EXEC  "xterm -ls"

-- 
Jim Reisert AD1C, <jjreisert@alum.mit.edu>, http://www.ad1c.us

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Re: Problem with xterm-301-1

[Thomas Dickey]

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On Thu, Feb 20, 2014 at 11:33:22AM -0700, Jim Reisert AD1C wrote:
> On Thu, Feb 20, 2014 at 10:47 AM, Ola Strömfors wrote:
> 
> > After updating from 291-1 to 301-1 xterm starts /bin/sh instead of
> > my shell specified in /etc/passwd or in the SHELL environment variable.
> 
> I saw the same thing, but only on my home computer running Windows 7
> Pro 64-bit, not on my work laptop running Windows 7 Enterprise 64-bit.
> 
> I start Xwin this way (i.e. same as Cygwin-X group in Start menu):
> 
>     C:\Cygwin\bin\run.exe /usr/bin/bash.exe -l -c /usr/bin/startxwin.exe
> 
> I don't know why SHELL defined as /bin/sh by default (my entry in the
> /etc/passwd file invokes bash).  I could not find a way to change

That sounds like a case reported Saturday - see

	ftp://invisible-island.net/temp/xterm-301a.patch.gz

I have a few other reports on different issues to iron out, and
expect to be ok with #302 sometime next week.

-- 
Thomas E. Dickey <dickey@invisible-island.net>
http://invisible-island.net
ftp://invisible-island.net

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RE: Problem with xterm-301-1

[Matt Seitz (matseitz)]

> From: Ola Strömfors [mailto:ola.stromfors@gmail.com]
> 
> After updating from 291-1 to 301-1 xterm starts /bin/sh instead of
> my shell specified in /etc/passwd or in the SHELL environment variable.
> 
> The workaround I have found is to create /etc/shells with a list of
> permitted shells, e.g.

>From http://invisible-island.net/xterm/xterm.log-contents.html#xterm_301:

Patch #301 - 2014/01/19
only set SHELL environment variable to programs found in /etc/shells (prompted by patch/report by Al Poole).


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Re: Problem with xterm-301-1

[Thomas Dickey]

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On Thu, Feb 20, 2014 at 06:45:00PM +0000, Matt Seitz (matseitz) wrote:
> > From: Ola Strömfors [mailto:ola.stromfors@gmail.com]
> > 
> > After updating from 291-1 to 301-1 xterm starts /bin/sh instead of
> > my shell specified in /etc/passwd or in the SHELL environment variable.
> > 
> > The workaround I have found is to create /etc/shells with a list of
> > permitted shells, e.g.
> 
> >From http://invisible-island.net/xterm/xterm.log-contents.html#xterm_301:
> 
> Patch #301 - 2014/01/19
> only set SHELL environment variable to programs found in /etc/shells (prompted by patch/report by Al Poole).

yes.

(whether xterm should use $SHELL incoming is a different issue that I
am reconsidering)

-- 
Thomas E. Dickey <dickey@invisible-island.net>
http://invisible-island.net
ftp://invisible-island.net

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RE: Problem with xterm-301-1

[Matt Seitz (matseitz)]

> From: Thomas Dickey [mailto:dickey@his.com]
> 
> On Thu, Feb 20, 2014 at 06:45:00PM +0000, Matt Seitz (matseitz) wrote:
> > > From: Ola Strömfors [mailto:ola.stromfors@gmail.com]
> > >
> > > After updating from 291-1 to 301-1 xterm starts /bin/sh instead of
> > > my shell specified in /etc/passwd or in the SHELL environment variable.
> > >
> > > The workaround I have found is to create /etc/shells with a list of
> > > permitted shells, e.g.
> >
> 
> (whether xterm should use $SHELL incoming is a different issue that I
> am reconsidering)

Is there any ETA for a resolution of this issue?

I've been holding off on upgrading to xterm-301 because of this issue.  I'm not sure if there is some patch coming soon (either to xterm or adding a default /etc/shells to Cygwin), or if I should just plan on manually creating my own "/etc/shells".


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Re: Problem with xterm-301-1

[Thomas Dickey]

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On Thu, Feb 27, 2014 at 06:05:48PM +0000, Matt Seitz (matseitz) wrote:
> > From: Thomas Dickey [mailto:dickey@his.com]
> > 
> > On Thu, Feb 20, 2014 at 06:45:00PM +0000, Matt Seitz (matseitz) wrote:
> > > > From: Ola Strömfors [mailto:ola.stromfors@gmail.com]
> > > >
> > > > After updating from 291-1 to 301-1 xterm starts /bin/sh instead of
> > > > my shell specified in /etc/passwd or in the SHELL environment variable.
> > > >
> > > > The workaround I have found is to create /etc/shells with a list of
> > > > permitted shells, e.g.
> > >
> > 
> > (whether xterm should use $SHELL incoming is a different issue that I
> > am reconsidering)
> 
> Is there any ETA for a resolution of this issue?

I added that to my changes for #302 yesterday, and have a couple more
issues to resolve (probably #302 will be available this weekend)

> I've been holding off on upgrading to xterm-301 because of this issue.  I'm
> not sure if there is some patch coming soon (either to xterm or adding a
> default /etc/shells to Cygwin), or if I should just plan on manually creating
> my own "/etc/shells".

With #302, this will work:

	SHELL=whatever xterm

but this is a special case (the program will run - a fix - but
will need to be in /etc/shells to have xterm set $SHELL):

	xterm whatever

-- 
Thomas E. Dickey <dickey@invisible-island.net>
http://invisible-island.net
ftp://invisible-island.net

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Re: Problem with xterm-301-1

[Corinna Vinschen]

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On Feb 27 17:00, Thomas Dickey wrote:
> On Thu, Feb 27, 2014 at 06:05:48PM +0000, Matt Seitz (matseitz) wrote:
> > > From: Thomas Dickey [mailto:dickey@his.com]
> > > 
> > > On Thu, Feb 20, 2014 at 06:45:00PM +0000, Matt Seitz (matseitz) wrote:
> > > > > From: Ola Strömfors [mailto:ola.stromfors@gmail.com]
> > > > >
> > > > > After updating from 291-1 to 301-1 xterm starts /bin/sh instead of
> > > > > my shell specified in /etc/passwd or in the SHELL environment variable.
> > > > >
> > > > > The workaround I have found is to create /etc/shells with a list of
> > > > > permitted shells, e.g.
> > > >
> > > 
> > > (whether xterm should use $SHELL incoming is a different issue that I
> > > am reconsidering)
> > 
> > Is there any ETA for a resolution of this issue?
> 
> I added that to my changes for #302 yesterday, and have a couple more
> issues to resolve (probably #302 will be available this weekend)
> 
> > I've been holding off on upgrading to xterm-301 because of this issue.  I'm
> > not sure if there is some patch coming soon (either to xterm or adding a
> > default /etc/shells to Cygwin), or if I should just plan on manually creating
> > my own "/etc/shells".
> 
> With #302, this will work:
> 
> 	SHELL=whatever xterm
> 
> but this is a special case (the program will run - a fix - but
> will need to be in /etc/shells to have xterm set $SHELL):
> 
> 	xterm whatever

May I politely ask why xterm cares at all?  What is the reasoning
behind this?

Heere's why I'm asking:

Xterm is not a login process, like login(1) or sshd(8).  If somebody
starts xterm, the login process itself has long exec'ed the login shell,
and the permission problem what shell is allowed to be started as login
shell is done.  Afterwards, the user is usually allowed to start
whatever process he or she has a right to.  It looks really weird to me
that a terminal emulator would decide that certain processes are not
allowed to a user which otherwise work fine.


Corinna

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Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Maintainer                 cygwin AT cygwin DOT com
Red Hat

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